Perhaps you should try some spelling variations:
"maternal nutrition" » "material nutrition", "materials nutrition", "internal nutrition", "maternal nutricion", "materiall nutrition"
"materiall nutrition" » "materiall nutricion", "material nutrition", "materials nutrition", "materiales nutrition"
"materna nutritivo" » "material nutritivo"
"materna nutritiva" » "material nutritiva"

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"maternal nutrition\") OR (\"materiall nutrition\"))) OR (((\"materia nutritivo\") OR (((\"materna nutritivo\") OR (\"materna nutritiva\"))))))~".
• Removing quotes may allow a broader search: (((( maternal nutrition ) OR ( materiall nutrition ))) OR ((( materia nutritivo ) OR ((( materna nutritivo ) OR ( materna nutritiva ))))))~.
• Adding a wildcard symbol may retrieve word variants: (((("maternal nutrition") OR ("materiall nutrition"))) OR ((("materia nutritivo") OR ((("materna nutritivo") OR ("materna nutritiva"))))))*.